Saw-swage



(No Mod e1.).

. B. H. MILLERv SAW SWAGE. No. 351,520. Patented oct. 2 6, 1886.

^ line X X in Fig. l.

UNITED STATES PATENT OFFICE.

BIONv H. MILLEIQOF BAY CITY, MICHIGAN.

SAW-SWAGE.

SPECIFICATION forming part of Letters Patent No. 351,520, dated October 26, 1886.

Application filed September 24, 1884. Serial No. 143,861. (No model.)

the elampingserews, as hereinafter described,

and specifically set forth in the claim.

In the drawings which accompany' this specification, Figure l'is a vertical central section showing how the swage is used in operation. Fig. 2 is a cross-section thereof on A is the stock. It is provided upon its lower part with the central groove or recess, a, of sufficient width to-enable it to straddle the sawblade, as shown in the drawings.

B is the stationary die or anvil, removably secured at the bottom of the recess a in any suitable manner.

C is the movable die, which is fitted into a corresponding slot, b,-in the diestock, so as to' be firmly guided in its operation. Its yupper end is connected to a Iever, D, the lower end of which terminates in an eccentric-head, c, which when the lever is vibrated reciprocatingly operates the movable die. The lower end of this movable die is provided with a -through the sides of the die-stock, with their inner ends projecting within the groove a. One of these clamp-screws'is provided with a hand-1ever,F, for operating it. The object of v these clamp-screws is to firmly clamp the tool to the saw-tooth 4under operation, the clampbetween them.

screw E being at first sufficiently adj usted, so that only a fraction of aturn of the other elampscrew is required to firmly grip the tooth To give a very iirm hold, the inner faces of these clamp-screws are preferably serrated. They are also so reduced in shape that if the tooth should. be an, inserted one they will. only grip the tooth proper and no part of the body ofthe saw, aud in this lies the gist of my invention.

In practice, the tool is made to straddle the saw-tooth which it is desired to operate upon, bringing the cutting-edge ofthe tooth in proper position between the coacting parts of the dies. In this position the tool is held in place by the face of the anvil resting against the whole outer -face of the saw-tooth, and in this position the operator iirmly clamps his tool to the sawt tooth by turning the lever F in the proper direction. The operation of swaging the tooth is then performed by the operator actuating the lever D inY the proper direction to force Vthe shoulder d of the movable die against the sawtooth. In this operation it first draws the metal from the base of the tooth toward its cutting edge, compressing the metal and spreading its cutting-edge, and then nipping off the waste at the cutting-edge.

To better steady the tool whilein operation, I make the levers D F preferably move in opposite directions, so that the operator may keep lone hand upon the clamping -lever F while he is operating the other lever, D, using the former lever as a point of resistance,which allows him to use his utmost strength without danger of the clamp-screws gripping insufficiently tight. By reducing the ends of the clampscrews, as shown, I not only provide for the better swaging of an inserted tooth, but I am enabled to clamp the tooth right at the point where the swaging is being done.

I have shown and described the twolevers for operating the movable die and the clamping device as being moved in opposite directions; but no broad claim is made to that construction in this case, as it forms the basis of a claim in an application filed by me August 20, 1882, Serial No. 141,036.

What I claim as my invention is- In a saw-swaging device, the clamp-screws E E', tapped through the sides of the stock, and having reduced inner ends, substantially as and for the purposes specilied.

BION H. MILLER.

Vitnesses:

H. S. SPRAGUE, E. SCULLY. 

